For initial 20 minutes, there was rapid increase in extraction in all dry gel suspension loadings. Since the solvent is free
of any solute, thus solute experiences large driving force to get dissolved in the solvent, but at later stage, the concentration
gradient decreases, affecting the rate of extraction. The extracted equilibrium concentration of aloin when compared with
the maximum amount of aloin present in the dry gel had shown increasing at higher loading. At higher loading, the
concentration gradient at the solid-liquid interface increases with time as the amount of solvent remains unchanged. From
Fig. 7, 7.5 % dry gel loading was selected for further experiment as maximum extraction of aloin was achieved.